Just ran the Marine corp marathon in these. They live up to the name! I did not stop at any point in the marathon to change socks. In previous long runs or marathons I have carried a change of socks. The dry new socks felt fresh. No need to change your socks cause your feet stay dry. I had no blister or shoe problem of any kind. Again, living up to name.... no blisters. I am sold on these socks!!